package com.example.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.reggie.common.R;
import com.example.reggie.dto.DishDto;
import com.example.reggie.entity.Category;
import com.example.reggie.entity.Dish;
import com.example.reggie.entity.DishFlavor;
import com.example.reggie.service.CategoryService;
import com.example.reggie.service.DishFlavorService;
import com.example.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: 老肥！！！
 * @Date: 2022/09/17/9:36
 * @Description: 不想学代码了！！！
 */
//菜品管理
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private RedisTemplate redisTemplate;
// 新增菜品
    @PostMapping
    public R<String> save(@RequestBody  DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        //        清理某个分类下面的菜品缓存数据
        String keys = "dish_" + dishDto.getCategoryId()+"_"+dishDto.getStatus();
        redisTemplate.delete(keys);
        return R.success("新增菜品成功");
    }

//    分页
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
//      构造分页构造器对象
        Page<Dish> dishPage = new Page<>(page,pageSize);
        Page<DishDto> dtoPage = new Page<>();
//      条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        添加过滤条件
        queryWrapper.like(name!=null,Dish::getName,name);
//        添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        dishService.page(dishPage,queryWrapper);
//        分页对象的拷贝,其中records属性不进行拷贝,因为dishpage的records的泛型为dish,而dishDtoPage的泛型为dishDto
        BeanUtils.copyProperties(dishPage,dtoPage,"records");
//        创建一个dishDtoPage中的records
        List<DishDto> dishDtoList = new ArrayList<>();
//        遍历dishPage中的records集合
        for (Dish dish: dishPage.getRecords()){
            DishDto dishDto = new DishDto();
//            将父类对象拷贝给子类
            BeanUtils.copyProperties(dish,dishDto);
//            根据dishDTO中的CategoryId(继承父类dish的属性)的id查询关联的实体类category(菜品分类)
            Category category = categoryService.getById(dishDto.getCategoryId());
            //获取菜品分类的name并且赋值
            if(category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            //将拷贝过来的dishDto并且赋值了categoryName的对象放到dishDtoPage中的records中
            dishDtoList.add(dishDto);
        }
        //将dishDtoPage中的records赋值
        dtoPage.setRecords(dishDtoList);
        return R.success(dtoPage);
    }
//    根据id查询菜品信息以及对应的口味信息
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }
    // 修改菜品
    @PutMapping
    public R<String> update(@RequestBody  DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
//         清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

//        清理某个分类下面的菜品缓存数据
        String keys = "dish_" + dishDto.getCategoryId()+"_"+dishDto.getStatus();
        redisTemplate.delete(keys);
        return R.success("修改菜品成功");
    }
//    根据条件查询对应的菜品信息
//    @GetMapping("/list")
//    public  R<List<Dish>> list(Dish dish){
////        构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
//        queryWrapper.eq(Dish::getStatus,1);
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//
//        List<Dish> list = dishService.list(queryWrapper);
//        return R.success(list);
//    }
//    批量删除菜品
    @DeleteMapping
    public R<String> batchDelete(@RequestParam("ids") List<Long> ids){
        dishService.batchDeleteByids(ids);
        return R.success("删除成功");
    }
//    批量修改菜品售卖状态
    @PostMapping("/status/{status}")
    public R<String> updateSaleStatus(@PathVariable("status") Integer status,@RequestParam List<Long> ids){
        if (dishService.batchUpdateStatu(status,ids)){
            return  R.success("菜品售卖状态已修改");
        }else{
            return  R.error("菜品售卖状态无法更改");
        }
    }
    //    根据条件查询对应的菜品信息
    @GetMapping("/list")
    public  R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;
//        动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
//            从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
//          如果存在,直接返回,无需查询数据库
        if (dishDtoList != null){
            return R.success(dishDtoList);
        }
//        构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);
        dishDtoList =
                list.stream()
                        .map(
                                (item) -> {
                                    DishDto dishDto = new DishDto();
                                    BeanUtils.copyProperties(item, dishDto);
                                    // 分类id
                                    Long categoryId = item.getCategoryId();
                                    // 根据id查分类对象。
                                    Category category = categoryService.getById(categoryId);
                                    // 获取categoryName
                                    if (category != null) {
                                        String categoryName = category.getName();
                                        dishDto.setCategoryName(categoryName);
                                    }
                                    // 在原来的基础上追加flavor信息。
                                    Long dishId = item.getId();
                                    LambdaQueryWrapper<DishFlavor> lambdaqw = new LambdaQueryWrapper<>();
                                    lambdaqw.eq(DishFlavor::getDishId,dishId);
                                    List<DishFlavor> dishFlavors = dishFlavorService.list(lambdaqw);
                                    dishDto.setFlavors(dishFlavors);
                                    return dishDto;
                                })
                        .collect(Collectors.toList());
        //        如果不存在，需查询数据库，将查询到的菜品数据缓存到redis中
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }
}
